function makeUUID(){
	return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(
		a,  // character
		b   // placeholder for random number
		){
			return
				b = Math.random() * 16,
				(
					a == "y"
						?
							b & 3 | 8 	// bring the number down to between 9 - 12
						:
							b | 0 		// |0 insures and integer
				).toString(16)
		})
}